Code :

Code: 6220
Description: Abnormally high fuser thermistor 1 (edge) temperature
The fuser temperature exceeds 240 °C/464 °F for 1 s.
Causes: Deformed connector pin.
Defective cooling fan motor.
Defective fuser thermistor.
Defective engine PWB.
Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
Defective cooling fan motor. Replace the fuser fan motor.
Defective fuser thermistor. Replace the fuser unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: 6230
Description: Fuser thermistor 1 (edge) break error
During warming up a hearter, fuser thermistor 2 detects a temperature of 100 °C/212 °F or higher and, fuser thermistor 1 detects a temperature of 37 °C/99 °F or lower.
Causes: Defective connector cable or poor contact in the connector.
Deformed connector pin.
Defective fuser thermistor.
Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser thermistor 1 and fuser PWB (YC3) Fuser unit and engine PWB (YC22)
Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
Defective fuser thermistor. Replace the fuser unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: 6250
Description: Abnormally low fuser thermistor 1 (edge) temperature
The fuser temperature lower than 100 °C/212 °F is detected continuously for 1 s during printing. The fuser temperature lower than 50 °C/122 °F is detected continuously for 1 s during pre-heating.
Causes: Deformed connector pin.
Defective IH PWB.
Defective fuser thermistor.
Defective fuser heater.
Defective engine PWB.
Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
Defective IH PWB. Replace the IH PWB and check for correct operation.
Defective fuser heater. Defective fuser thermistor. Replace the fuser unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: 6410
Description: Fuser unit type mismatch problem
Absence of the fuser unit is detected.
Causes: Fuser unit connector inserted incorrectly.
Different type of the fuser unit is installed.
Remedy: Fuser unit connector inserted incorrectly. Reinsert the fuser unit connector if necessary.
Different type of the fuser unit is installed. Install the correct fuser unit.

Code: 6600
Description: Belt rotation error
The belt was detected to stop for 1 s continuously during motor remote is on.
Causes: Defective fuser motor.
Defective IH belt.
Defective IH PWB.
Defective engine PWB.
Remedy: Defective fuser motor. Replace the fuser motor.
Defective IH belt. Replace the fuser unit.
Defective IH PWB. Replace the IH PWB and check for correct operation.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: 6720
Description: Belt rotation error (IHPWB)
Causes: Defective IH PWB.
Defective fuser motor.
Defective fuser unit.
Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
Defective fuser motor. Replace the fuser motor.
Defective fuser unit. Replace the fuser unit.

Code: 6730
Description: Abnormally high IGBT1 temperature (IHPWB)
Causes: Defective IH PWB.
Defective cooling fan motor.
Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
Defective cooling fan motor. Replace the IH fan motor.